That’s not correct.
https://www.law.cornell.edu/uscode/text/18/2381
That said, I don’t believe Trump will be charged with ‘Treason’.
Sedition, conspiracy to defraud the US, conspiracy to disrupt the lawful business of government, witness tampering, unlawful removal of state secrets, tax evasion, wire fraud, yes, treason, no.
Not even the Rosenbergs were charged with treason, though in his pre (death) sentencing summary Judge Kaufman did explicitly refer to the Rosenberg’s treason.
And there’s the rub.
Regardless of what the legally and constitutional definition of treason is there is an equally valid lay understanding of treasonous acts that absolutely do have a place in discussion of Trump’s behavior.